Batalha Naval (Battleships) is a version of the well-known battleships game to play online against other players connected to a server. To play online, look for available servers at the game's Web site.

python-symmetric-jsonrpc is a JSON-RPC implementation for Python that is symmetric (both ends can call each other), asynchronous (calls can interleave with responses), thread-safe, and transport agnostic (can be run on top of e.g. an SSL connection).

libsockmux-glib is an implementation of the sockmux protocol, using GIO data types and using glib functions internally. The interface offered to applications is very simple and straightforward.
sockmux specifies a simple way for muxing messages and data streams onto a single socket for network and local communication streams.

OnPosix is a tiny library to abstract POSIX mechanisms to C++ developers. Most features offered by this library can be found either inside the Boost library or in a library compliant with the C++11 standard. Unfortunately, however, for some embedded Linux devices, these libraries cannot represent viable solutions, due to the lack of memory space (for the Boost libraries) and the lack of a new C++ compiler (e.g., on Xilinx MicroBlaze). On these platforms, the OnPosix library represents a good and cheap solution to have object-oriented POSIX mechanisms. The library offers support for threads, mutual exclusion, sockets, logging, timing, etc.

s6-networking is a collection of small Unix tools designed to help networking. It includes clock synchronization, Unix and TCP super-servers, Unix and TCP access control, and other miscellaneous utilities. It is particularly suited for management of clients and servers on embedded devices, but works just as well on larger systems.

TML/SIDEX is a BEEP (Block Entensible Exchange Protocol) based SDK for implementing peer to peer and/or client/server communication on various platforms and target languages. It provides type safe data modelling with a simple XML based format that minimizes errors, and its synchronous, asynchronous, and multithreaded interfaces guarantee performance.